<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <style>
        div{
            width:300px;
            height:300px;
            border-style:solid;
            border-width:26px;
            /*border-image:url(img/border.png) 26 26 26 26;*/
            border-image-source:url(img/border.png);
            border-image-slice:26 26 26 26 fill;
            /*border-image-repeat:stretch;*/
            /*border-image-repeat:repeat;*/
            border-image-repeat:round;
            /*border-image-outset:10;*/
            /*border-image-width:1;*/
            background:green;
        }
    </style>
</head>
<body>
    <div>1231231312</div>
</body>
</html>
